Memory stones (SoW1)

Memory stones in Symphony of War The Nephilim saga is a currency unlocked with New game+ mode, which was added with the Legends DLC. This currency allows the player to obtain artifacts and units from a previous playthrough.

Previous units (Mercenaries)

Units from a previous playthrough, can be bought from the Memory stones marketplace. They all have the loyalty traits removed and replaced by the Mercenary trait, thus costing more capacity at the start.